deprove
→
English:
de-
+
improve
Detailed etymology
definitions
verb
- to get worse; to reduce in quality
- to make worse; to reduce in quality
My studying skills and mental capacity deproved so much after two years in NS.
usage notes
As it is a logical and valid English formation, the term is sometimes (albeit rarely) used in English by English speakers, though it is not an established word found in any standard dictionaries.